                    &\multicolumn{1}{c}{(1)}         &\multicolumn{1}{c}{(2)}         &\multicolumn{1}{c}{(3)}         &\multicolumn{1}{c}{(4)}         &\multicolumn{1}{c}{(5)}         &\multicolumn{1}{c}{(6)}         &\multicolumn{1}{c}{(7)}         &\multicolumn{1}{c}{(8)}         &\multicolumn{1}{c}{(9)}         &\multicolumn{1}{c}{(10)}         &\multicolumn{1}{c}{(11)}         &\multicolumn{1}{c}{(12)}         &\multicolumn{1}{c}{(13)}         &\multicolumn{1}{c}{(14)}         &\multicolumn{1}{c}{(15)}         \\
\midrule
Standardized values of pop\_dim2&      -0.019\sym{***}&       0.027\sym{***}&       0.025\sym{**} &       0.013         &       0.021\sym{**} &      -0.006         &       0.022\sym{***}&       0.019\sym{**} &       0.014         &       0.019\sym{**} &      -0.000         &       0.025\sym{***}&       0.023\sym{*}  &       0.018         &       0.022\sym{*}  \\
                    &     [0.005]         &     [0.010]         &     [0.010]         &     [0.011]         &     [0.010]         &     [0.005]         &     [0.008]         &     [0.008]         &     [0.010]         &     [0.009]         &     [0.004]         &     [0.009]         &     [0.012]         &     [0.014]         &     [0.013]         \\
\addlinespace
core=1 $\times$ Standardized values of pop\_dim2&                     &                     &      -0.042\sym{***}&      -0.041\sym{***}&      -0.047\sym{***}&                     &                     &      -0.024\sym{***}&      -0.024\sym{***}&      -0.026\sym{***}&                     &                     &      -0.024\sym{**} &      -0.024\sym{**} &      -0.026\sym{**} \\
                    &                     &                     &     [0.010]         &     [0.009]         &     [0.010]         &                     &                     &     [0.009]         &     [0.009]         &     [0.009]         &                     &                     &     [0.011]         &     [0.011]         &     [0.011]         \\
\midrule
Observations        &        2171         &        2277         &        4448         &        4448         &        4444         &        1995         &        2064         &        4059         &        4059         &        4055         &        1587         &        1569         &        3156         &        3156         &        3153         \\
R-squared           &        0.09         &        0.13         &        0.14         &        0.14         &        0.15         &        0.08         &        0.12         &        0.11         &        0.11         &        0.11         &        0.06         &        0.12         &        0.10         &        0.10         &        0.10         \\
